A deterioration in the myelin sheaths of motor axons to the lower leg would be expected to
A) remove the restraints to ion movement and speed up impulse transmission.
B) cause immobility of the leg due to cessation of impulses to leg muscles.
C) slow the rate of transmission and cause lack of motor control.
D) have little effect because the sheaths are for insulation only.
E) cause paralysis.

Question

Quizplus · Accepted Answer

The myelin sheath acts as an insulator to speed up the transmission of nerve impulses. Deterioration of the myelin sheath would slow down impulse transmission, leading to impaired motor control.

A Deterioration in the Myelin Sheaths of Motor Axons to the Lower